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Covalent crystals are not necessarily opaque. Think of diamond, pure quartz crystals, pure aluminium oxide crystals these all are colorless and transparent.

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11y ago

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Why some crystals are opaque?

Thse crystals do not transmit light radiation.


What is the transparency of hematite?

crystals that ar opaque


What exists as covalent crystals in the solid state?

Diamond and silicon are examples of covalent crystals in the solid state. In covalent crystals, atoms are held together by strong covalent bonds, resulting in a network structure with high melting points and hardness.


Why are metallic crystals opaque while crystals like diamond are not?

Metallic crystals absorb light in the visible spectra, diamond crystal do not.


What forms crystals covalent or ionic?

Crystals can form from both covalent and ionic compounds. Covalent crystals are held together by covalent bonds, where atoms share electrons to form a stable structure. Ionic crystals are held together by ionic bonds, where oppositely charged ions attract each other to form a lattice structure.


An LCD monitor uses crystals that become opaque when what is applied?

phosphor


Can you compare and contrast the 4 types of crystals?

Covalent, Metallic, and Ionic crystals have high melting points and densities, but molecular crystals tend to be soft and has a lower melting point. Covalent crystal=covalent bond and Ionic crystal=ionic bond.


What are some properties of covalent crystals?

Covalent crystals have strong covalent bonds between atoms, resulting in a hard and brittle structure. They have high melting and boiling points due to the strong bonds that hold the structure together. Covalent crystals are typically insulators and have low conductivity of heat and electricity.


Can crystals ever be made out of covalent bonds or is it strictlly only ionic?

Crystals can be made from covalent bonds as well as ionic bonds. Covalent crystals are formed when atoms share electrons, creating a network of interconnected atoms with strong directional bonds. Diamond and quartz are examples of covalent crystals, while sodium chloride (salt) is an example of an ionic crystal.


Is atmosphere ionic or covalent molecules?

Covalent molecules with small amounts of argon which is monatomic. All molecules are covalent. Ionic compounds form crystals, not molecules.


Which type of bond forms compounds with distinctive shapes rather than forming massive crystals?

Covalent bond. Molecular compounds are formed by covalent bonds. Ionic bonds and metallic bonds form large crystal lattices (Some large crystals are covalent- like diamond)


What kind of chemical bond do crystals have?

Ionic compunds which are crystalline- have ionic bonds. Giant covalent can also be crystalline e.g. diamond and silica- these have covalent bonds. Molecular compounds crystallise - these have covalent bonds and the crystals are held together by van der waals forces. and sometimes by hydrogen bonds.